Form for making cement or concrete steps.



H. L. PARK.

FORM FOR MAKING CEMENT OR GONGRETE STEPS.

APPLIGATION FILED JAN. 2, 1912.

1 12 3Q? Patented Jan. 12, 1915.

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H. L. PARK,

FORM FOR MAKING CEMENT OR CONCRETE STEPS.

APPLICATION FILED JAN. 2, 1912.

1,1243%? Patented Jan. 12, 1915.

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HOWARD L. PARK, OF READING, MASSACHUSETTS.

FORM FOR MAKING CEMENT 0R CONCRETE STEPS.

Specification of Letters Patent.

Patented Jan. 12, 1915.

Application filed January 2, 1912. Serial N 0. 668,973.

To all whom 2'2 may concern Be it known that I, HOWARD L. PARK, acitizen of the United States, residing at Reading, in the county ofMiddleseX and State of Massachusetts, have invented certain new anduseful Improvements in Forms for Making Cement or Concrete Steps, ofwhich the following is a specification.

This invention has for its object to provide a simple and efficient formfor making cement or concrete steps, and also to provide improved meansfor adjusting the parts constituting the form so as to adapt the same tothe height of the risers and width of the treads which the steps are tohave.

The invention also has for its object to provide a novel constructionand arrangement of parts which can be easily and quickly assembled andadjusted to conform to the desired dimensions of the steps.

In order that the invention may be better understood, reference is hadto the accompanying drawing in which- Figure 1 is a perspective view ofthe form set up ready for use. Fig. 2 is a vertical section on the line22 of Fig. 1. Fig. 3 is a perspective view of one end of one of the endmembers of the mold. Fig. 4 is a sectional detail showing a slightmodification.

Referring specifically to the drawing, the form consists of a series ofadjustably connected end members which are spaced apart laterallyaccording to the desired width of the steps. These members supporttransverse vertically arranged boards 5 which determine the risers ofthe steps. The end members are each in two sections, indicated at 6 and7, respectively, said sections being boards of suitable length which areplaced vertically and face-to-face, with the section 7 extending abovethe top edge of the section 6. The two sections are held together nearone of their ends by a bolt 8 which is secured by a nut 9, the section 7having a vertical slot 10 through which the bolt passes. A bolt 11fastens the sections together near their other ends. said bolt beingalso secured by a nut 12 and passing through a slot 13 in the section 7.On the bolt 11 is pivoted a link 14 which depends from said bolt andsupports at its lower end one end of a longitudinally slotted bar 15.the slot of said bar being indicated at 16. The other end of the bar issupported by the lower end of a link 17 which is pivoted to and dependsfroma bolt 18 carried by the section 6.

The bar 15 is located below the bottom edge of the section 6, andthrough the slot 16 thereof passes a bolt 19 carrying at one of its endsa cam-clamp 20 for tightening up the same. If desired, a hand-nut 21, asshown in Fig. 4, may be provided for the same purpose.

The function of the bar 15 and the bolt 19 is to connect one of theherein-described sectional end members to a similar member below thesame, the several end members being all alike, and connected in a likemanner. The section 6 of the end member which is below the one firstdescribed has a vertical slot 22 through which the bolt 19 passes. Inassembling the several end members, the sections thereof are adjusted sothat the top edge of the section 7 is flush with the bottom edge of thesection 6 of the next member above. The end members are also arranged sothat each succeeding member projects beyond one end of the next memberbelow for a distance equal to the width of the tread of the steps. Thiswidth is readily varied as the slots 16 permit longitudinal adjustmentof the members with respect to each other. The desired height of therisers is attained by the vertical adjustment of the sections 6 and 7relative to each other. the slots 1O, 13 and 22 permitting suchadjustment.

Across the ends of the end members, which are below the projectingportion of the endmember above, is placed the board 5 which forms theface of the risers, said board being held in place by brads 24 carriedby the sections 6 and 7, and projecting from one end thereof. The heightof the board is such that its top and bottom edges are flush with thecorresponding edges of the end member. Riser boards of different heightswill be employed according to the desired height of the risers.

To the ends of the sections 6. opposite the ends against which the riserboards 5 are placed, are secured metal strips 25 which overlap thecorresponding ends of the sections 7.

In operation, a. pair of end members are set up, suitably spaced apartaccording to the width the steps are to have, and braced by pins or anysuitable means 26 so that they may remain in upright position. A riserboard 5 is now placed in position for the first riser, and cement orconcrete is filled in behind the same for the first step. Another pairof end members and a riser board is next put in place and the materialis filled in-behind the latter to make the second step. This operationis continued until the desired number of steps are formed. The treadsare formed by leveling off the material flush With the up er edges ofthe riser boards. The materiai may be held in place on the sides of themold by boards. The steps are usually built against a buttress, but ifnecessary boards can be used on the sides.

In the ordinary method of molding cement or concrete steps, a form isbuilt which is practically a complete set of stairs or steps of thedesired width, length and height, and this form is inverted and filled,after which the form is knocked away. This method is expensive as itrequires a skilled carpenter to build the form, and the form also cannotbe used again. The form which is the subject of the present inventioncan be used over and over again, and can be easily and quickly set upand adjusted to the desired dimensions of the steps, and does notrequire skilled labor. It Will therefore be evident that a cement stepcan be cheaply made. The links 14 work on their pivots very slightly sothat if there should be any play, the forward pressure of the materialwould tend to tighten the connections. The pressure sidewise is verysmall, and the end members are held against spreading by the riserboards 5.

I claim:

1. A form for molding steps comprising series of laterally spaced endmembers mounted one above the other, said members being adjustablerelative to one another to project at their rear ends beyond thecorresponding end of the member below according to the width of thestep-tread, and each Copies of this patent may be obtained for of saidmembers consisting of sections which are connected in face to facerelation and adjustable vertically relative to each other, and riserforming members mounted on the aforesaid rear ends of the end members.

2. A form for molding steps, comprising laterally spaced and verticallyslotted end members mounted one above the other and projecting at one oftheir ends beyond the corresponding end of the member below, a pair oflinks pivoted to each of said members and depending therefrom, alongitudinally slotted bar carried by each pair of the links, a clampingmember passing through the slot of the bar and the vertical slot of theend member which is below the end member carrying the links, andriser-forming members mounted on the aforesaid ends of the end members.

3. A form for molding steps, comprising laterally spaced and verticallyslotted end members mounted one above the other and projecting at one oftheir ends beyond the corresponding end of the member below, and each ofsaid members consisting of adjustable sections to vary the heightthereof, a pair of links pivoted to each of said members and dependingtherefrom, a longitudinally slotted bar carried by each pair of thelinks, a clamping member passing through the slot of the bar and thevertical slot of the end member which is below the end member carryingthe links, and riser-forming members mounted on the aforesaid ends ofthe end members.

In testimony whereof I aiiiX my signature in presence of two witnesses.

HOWARD L. PARK.

Witnesses:

ELMER G. RICHARDSON, LOUISE G. ARENTZEN.

five cents each, by addressing the Commissioner of .Patents,

Washington, D. G.

